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block.js
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block.js
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/**
* External dependencies
*/
import classnames from 'classnames';
import { get, reduce, size, first, last } from 'lodash';
/**
* WordPress dependencies
*/
import { Component, Fragment } from '@wordpress/element';
import {
focus,
isTextField,
placeCaretAtHorizontalEdge,
placeCaretAtVerticalEdge,
} from '@wordpress/dom';
import { BACKSPACE, DELETE, ENTER } from '@wordpress/keycodes';
import {
getBlockType,
getSaveElement,
isReusableBlock,
isUnmodifiedDefaultBlock,
getUnregisteredTypeHandlerName,
} from '@wordpress/blocks';
import { KeyboardShortcuts, withFilters } from '@wordpress/components';
import { __, sprintf } from '@wordpress/i18n';
import { withDispatch, withSelect } from '@wordpress/data';
import { withViewportMatch } from '@wordpress/viewport';
import { compose } from '@wordpress/compose';
/**
* Internal dependencies
*/
import BlockEdit from '../block-edit';
import BlockMover from '../block-mover';
import BlockDropZone from '../block-drop-zone';
import BlockInvalidWarning from './block-invalid-warning';
import BlockCrashWarning from './block-crash-warning';
import BlockCrashBoundary from './block-crash-boundary';
import BlockHtml from './block-html';
import BlockBreadcrumb from './breadcrumb';
import BlockContextualToolbar from './block-contextual-toolbar';
import BlockMultiControls from './multi-controls';
import BlockMobileToolbar from './block-mobile-toolbar';
import BlockInsertionPoint from './insertion-point';
import IgnoreNestedEvents from '../ignore-nested-events';
import InserterWithShortcuts from '../inserter-with-shortcuts';
import Inserter from '../inserter';
import HoverArea from './hover-area';
import { isInsideRootBlock } from '../../utils/dom';
export class BlockListBlock extends Component {
constructor() {
super( ...arguments );
this.setBlockListRef = this.setBlockListRef.bind( this );
this.bindBlockNode = this.bindBlockNode.bind( this );
this.setAttributes = this.setAttributes.bind( this );
this.maybeHover = this.maybeHover.bind( this );
this.forceFocusedContextualToolbar = this.forceFocusedContextualToolbar.bind( this );
this.hideHoverEffects = this.hideHoverEffects.bind( this );
this.insertBlocksAfter = this.insertBlocksAfter.bind( this );
this.onFocus = this.onFocus.bind( this );
this.preventDrag = this.preventDrag.bind( this );
this.onPointerDown = this.onPointerDown.bind( this );
this.deleteOrInsertAfterWrapper = this.deleteOrInsertAfterWrapper.bind( this );
this.onBlockError = this.onBlockError.bind( this );
this.onTouchStart = this.onTouchStart.bind( this );
this.onClick = this.onClick.bind( this );
this.onDragStart = this.onDragStart.bind( this );
this.onDragEnd = this.onDragEnd.bind( this );
this.selectOnOpen = this.selectOnOpen.bind( this );
this.hadTouchStart = false;
this.state = {
error: null,
dragging: false,
isHovered: false,
};
this.isForcingContextualToolbar = false;
}
componentDidMount() {
if ( this.props.isSelected ) {
this.focusTabbable();
}
}
componentDidUpdate( prevProps ) {
if ( this.isForcingContextualToolbar ) {
// The forcing of contextual toolbar should only be true during one update,
// after the first update normal conditions should apply.
this.isForcingContextualToolbar = false;
}
if ( this.props.isTypingWithinBlock || this.props.isSelected ) {
this.hideHoverEffects();
}
if ( this.props.isSelected && ! prevProps.isSelected ) {
this.focusTabbable( true );
}
// When triggering a multi-selection,
// move the focus to the wrapper of the first selected block.
if ( this.props.isFirstMultiSelected && ! prevProps.isFirstMultiSelected ) {
this.wrapperNode.focus();
}
}
setBlockListRef( node ) {
this.wrapperNode = node;
this.props.blockRef( node, this.props.clientId );
// We need to rerender to trigger a rerendering of HoverArea
// it depents on this.wrapperNode but we can't keep this.wrapperNode in state
// Because we need it to be immediately availeble for `focusableTabbable` to work.
this.forceUpdate();
}
bindBlockNode( node ) {
this.node = node;
}
/**
* When a block becomes selected, transition focus to an inner tabbable.
*
* @param {boolean} ignoreInnerBlocks Should not focus inner blocks.
*/
focusTabbable( ignoreInnerBlocks ) {
const { initialPosition } = this.props;
// Focus is captured by the wrapper node, so while focus transition
// should only consider tabbables within editable display, since it
// may be the wrapper itself or a side control which triggered the
// focus event, don't unnecessary transition to an inner tabbable.
if ( this.wrapperNode.contains( document.activeElement ) ) {
return;
}
// Find all tabbables within node.
const textInputs = focus.tabbable
.find( this.node )
.filter( isTextField )
// Exclude inner blocks
.filter( ( node ) => ! ignoreInnerBlocks || isInsideRootBlock( this.node, node ) );
// If reversed (e.g. merge via backspace), use the last in the set of
// tabbables.
const isReverse = -1 === initialPosition;
const target = ( isReverse ? last : first )( textInputs );
if ( ! target ) {
this.wrapperNode.focus();
return;
}
target.focus();
// In reverse case, need to explicitly place caret position.
if ( isReverse ) {
placeCaretAtHorizontalEdge( target, true );
placeCaretAtVerticalEdge( target, true );
}
}
setAttributes( attributes ) {
const { clientId, name, onChange } = this.props;
const type = getBlockType( name );
onChange( clientId, attributes );
const metaAttributes = reduce(
attributes,
( result, value, key ) => {
if ( get( type, [ 'attributes', key, 'source' ] ) === 'meta' ) {
result[ type.attributes[ key ].meta ] = value;
}
return result;
},
{}
);
if ( size( metaAttributes ) ) {
this.props.onMetaChange( metaAttributes );
}
}
onTouchStart() {
// Detect touchstart to disable hover on iOS
this.hadTouchStart = true;
}
onClick() {
// Clear touchstart detection
// Browser will try to emulate mouse events also see https://www.html5rocks.com/en/mobile/touchandmouse/
this.hadTouchStart = false;
}
/**
* A mouseover event handler to apply hover effect when a pointer device is
* placed within the bounds of the block. The mouseover event is preferred
* over mouseenter because it may be the case that a previous mouseenter
* event was blocked from being handled by a IgnoreNestedEvents component,
* therefore transitioning out of a nested block to the bounds of the block
* would otherwise not trigger a hover effect.
*
* @see https://developer.mozilla.org/en-US/docs/Web/Events/mouseenter
*/
maybeHover() {
const { isPartOfMultiSelection, isSelected } = this.props;
const { isHovered } = this.state;
if (
isHovered ||
isPartOfMultiSelection ||
isSelected ||
this.hadTouchStart
) {
return;
}
this.setState( { isHovered: true } );
}
/**
* Sets the block state as unhovered if currently hovering. There are cases
* where mouseleave may occur but the block is not hovered (multi-select),
* so to avoid unnecesary renders, the state is only set if hovered.
*/
hideHoverEffects() {
if ( this.state.isHovered ) {
this.setState( { isHovered: false } );
}
}
insertBlocksAfter( blocks ) {
this.props.onInsertBlocks( blocks, this.props.order + 1 );
}
/**
* Marks the block as selected when focused and not already selected. This
* specifically handles the case where block does not set focus on its own
* (via `setFocus`), typically if there is no focusable input in the block.
*
* @return {void}
*/
onFocus() {
if ( ! this.props.isSelected && ! this.props.isPartOfMultiSelection ) {
this.props.onSelect();
}
}
/**
* Prevents default dragging behavior within a block to allow for multi-
* selection to take effect unhampered.
*
* @param {DragEvent} event Drag event.
*
* @return {void}
*/
preventDrag( event ) {
event.preventDefault();
}
/**
* Begins tracking cursor multi-selection when clicking down within block.
*
* @param {MouseEvent} event A mousedown event.
*
* @return {void}
*/
onPointerDown( event ) {
// Not the main button.
// https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
if ( event.button !== 0 ) {
return;
}
if ( event.shiftKey ) {
if ( ! this.props.isSelected ) {
this.props.onShiftSelection();
event.preventDefault();
}
} else {
this.props.onSelectionStart( this.props.clientId );
// Allow user to escape out of a multi-selection to a singular
// selection of a block via click. This is handled here since
// onFocus excludes blocks involved in a multiselection, as
// focus can be incurred by starting a multiselection (focus
// moved to first block's multi-controls).
if ( this.props.isPartOfMultiSelection ) {
this.props.onSelect();
}
}
}
/**
* Interprets keydown event intent to remove or insert after block if key
* event occurs on wrapper node. This can occur when the block has no text
* fields of its own, particularly after initial insertion, to allow for
* easy deletion and continuous writing flow to add additional content.
*
* @param {KeyboardEvent} event Keydown event.
*/
deleteOrInsertAfterWrapper( event ) {
const { keyCode, target } = event;
if (
! this.props.isSelected ||
target !== this.wrapperNode ||
this.props.isLocked
) {
return;
}
switch ( keyCode ) {
case ENTER:
// Insert default block after current block if enter and event
// not already handled by descendant.
this.props.onInsertDefaultBlockAfter();
event.preventDefault();
break;
case BACKSPACE:
case DELETE:
// Remove block on backspace.
const { clientId, onRemove } = this.props;
onRemove( clientId );
event.preventDefault();
break;
}
}
onBlockError( error ) {
this.setState( { error } );
}
onDragStart() {
this.setState( { dragging: true } );
}
onDragEnd() {
this.setState( { dragging: false } );
}
selectOnOpen( open ) {
if ( open && ! this.props.isSelected ) {
this.props.onSelect();
}
}
forceFocusedContextualToolbar() {
this.isForcingContextualToolbar = true;
// trigger a re-render
this.setState( () => ( {} ) );
}
render() {
return (
<HoverArea container={ this.wrapperNode }>
{ ( { hoverArea } ) => {
const {
order,
mode,
isFocusMode,
hasFixedToolbar,
isLocked,
isFirst,
isLast,
clientId,
rootClientId,
isSelected,
isPartOfMultiSelection,
isFirstMultiSelected,
isTypingWithinBlock,
isCaretWithinFormattedText,
isEmptyDefaultBlock,
isMovable,
isParentOfSelectedBlock,
isDraggable,
className,
name,
isValid,
attributes,
} = this.props;
const isHovered = this.state.isHovered && ! isPartOfMultiSelection;
const blockType = getBlockType( name );
// translators: %s: Type of block (i.e. Text, Image etc)
const blockLabel = sprintf( __( 'Block: %s' ), blockType.title );
// The block as rendered in the editor is composed of general block UI
// (mover, toolbar, wrapper) and the display of the block content.
const isUnregisteredBlock = name === getUnregisteredTypeHandlerName();
// If the block is selected and we're typing the block should not appear.
// Empty paragraph blocks should always show up as unselected.
const showEmptyBlockSideInserter =
( isSelected || isHovered ) && isEmptyDefaultBlock && isValid;
const showSideInserter =
( isSelected || isHovered ) && isEmptyDefaultBlock;
const shouldAppearSelected =
! isFocusMode &&
! showSideInserter &&
isSelected &&
! isTypingWithinBlock;
const shouldAppearHovered =
! isFocusMode &&
! hasFixedToolbar &&
isHovered &&
! isEmptyDefaultBlock;
// We render block movers and block settings to keep them tabbale even if hidden
const shouldRenderMovers =
! isFocusMode &&
( isSelected || hoverArea === 'left' ) &&
! showEmptyBlockSideInserter &&
! isPartOfMultiSelection &&
! isTypingWithinBlock;
const shouldShowBreadcrumb =
! isFocusMode && isHovered && ! isEmptyDefaultBlock;
const shouldShowContextualToolbar =
! hasFixedToolbar &&
! showSideInserter &&
( ( isSelected &&
( ! isTypingWithinBlock || isCaretWithinFormattedText ) ) ||
isFirstMultiSelected );
const shouldShowMobileToolbar = shouldAppearSelected;
const { error, dragging } = this.state;
// Insertion point can only be made visible if the block is at the
// the extent of a multi-selection, or not in a multi-selection.
const shouldShowInsertionPoint =
( isPartOfMultiSelection && isFirstMultiSelected ) ||
! isPartOfMultiSelection;
// The wp-block className is important for editor styles.
// Generate the wrapper class names handling the different states of the block.
const wrapperClassName = classnames(
'wp-block editor-block-list__block',
{
'has-warning': ! isValid || !! error || isUnregisteredBlock,
'is-selected': shouldAppearSelected,
'is-multi-selected': isPartOfMultiSelection,
'is-hovered': shouldAppearHovered,
'is-reusable': isReusableBlock( blockType ),
'is-dragging': dragging,
'is-typing': isTypingWithinBlock,
'is-focused':
isFocusMode && ( isSelected || isParentOfSelectedBlock ),
'is-focus-mode': isFocusMode,
},
className
);
const { onReplace } = this.props;
// Determine whether the block has props to apply to the wrapper.
let wrapperProps = this.props.wrapperProps;
if ( blockType.getEditWrapperProps ) {
wrapperProps = {
...wrapperProps,
...blockType.getEditWrapperProps( attributes ),
};
}
const blockElementId = `block-${ clientId }`;
// We wrap the BlockEdit component in a div that hides it when editing in
// HTML mode. This allows us to render all of the ancillary pieces
// (InspectorControls, etc.) which are inside `BlockEdit` but not
// `BlockHTML`, even in HTML mode.
let blockEdit = (
<BlockEdit
name={ name }
isSelected={ isSelected }
attributes={ attributes }
setAttributes={ this.setAttributes }
insertBlocksAfter={ isLocked ? undefined : this.insertBlocksAfter }
onReplace={ isLocked ? undefined : onReplace }
mergeBlocks={ isLocked ? undefined : this.props.onMerge }
clientId={ clientId }
isSelectionEnabled={ this.props.isSelectionEnabled }
toggleSelection={ this.props.toggleSelection }
/>
);
if ( mode !== 'visual' ) {
blockEdit = <div style={ { display: 'none' } }>{ blockEdit }</div>;
}
// Disable reasons:
//
// jsx-a11y/mouse-events-have-key-events:
// - onMouseOver is explicitly handling hover effects
//
// jsx-a11y/no-static-element-interactions:
// - Each block can be selected by clicking on it
/* eslint-disable jsx-a11y/mouse-events-have-key-events, jsx-a11y/no-static-element-interactions, jsx-a11y/onclick-has-role, jsx-a11y/click-events-have-key-events */
return (
<IgnoreNestedEvents
id={ blockElementId }
ref={ this.setBlockListRef }
onMouseOver={ this.maybeHover }
onMouseOverHandled={ this.hideHoverEffects }
onMouseLeave={ this.hideHoverEffects }
className={ wrapperClassName }
data-type={ name }
onTouchStart={ this.onTouchStart }
onFocus={ this.onFocus }
onClick={ this.onClick }
onKeyDown={ this.deleteOrInsertAfterWrapper }
tabIndex="0"
aria-label={ blockLabel }
childHandledEvents={ [ 'onDragStart', 'onMouseDown' ] }
{ ...wrapperProps }
>
{ shouldShowInsertionPoint && (
<BlockInsertionPoint
clientId={ clientId }
rootClientId={ rootClientId }
/>
) }
<BlockDropZone
index={ order }
clientId={ clientId }
rootClientId={ rootClientId }
/>
{ shouldRenderMovers && (
<BlockMover
clientIds={ clientId }
blockElementId={ blockElementId }
isFirst={ isFirst }
isLast={ isLast }
isHidden={ ! ( isHovered || isSelected ) || hoverArea !== 'left' }
isDraggable={
isDraggable !== false &&
( ! isPartOfMultiSelection && isMovable )
}
onDragStart={ this.onDragStart }
onDragEnd={ this.onDragEnd }
/>
) }
{ isFirstMultiSelected && (
<BlockMultiControls rootClientId={ rootClientId } />
) }
<div className="editor-block-list__block-edit">
{ shouldShowBreadcrumb && (
<BlockBreadcrumb
clientId={ clientId }
isHidden={
! ( isHovered || isSelected ) || hoverArea !== 'left'
}
/>
) }
{ ( shouldShowContextualToolbar ||
this.isForcingContextualToolbar ) && (
<BlockContextualToolbar
// If the toolbar is being shown because of being forced
// it should focus the toolbar right after the mount.
focusOnMount={ this.isForcingContextualToolbar }
/>
) }
{ ! shouldShowContextualToolbar &&
isSelected &&
! hasFixedToolbar &&
! isEmptyDefaultBlock && (
<KeyboardShortcuts
bindGlobal
eventName="keydown"
shortcuts={ {
'alt+f10': this.forceFocusedContextualToolbar,
} }
/>
) }
<IgnoreNestedEvents
ref={ this.bindBlockNode }
onDragStart={ this.preventDrag }
onMouseDown={ this.onPointerDown }
data-block={ clientId }
>
<BlockCrashBoundary onError={ this.onBlockError }>
{ isValid && blockEdit }
{ isValid && mode === 'html' && (
<BlockHtml clientId={ clientId } />
) }
{ ! isValid && [
<BlockInvalidWarning
key="invalid-warning"
clientId={ clientId }
/>,
<div key="invalid-preview">
{ getSaveElement( blockType, attributes ) }
</div>,
] }
</BlockCrashBoundary>
{ shouldShowMobileToolbar && (
<BlockMobileToolbar clientId={ clientId } />
) }
{ !! error && <BlockCrashWarning /> }
</IgnoreNestedEvents>
</div>
{ showEmptyBlockSideInserter && (
<Fragment>
<div className="editor-block-list__side-inserter">
<InserterWithShortcuts
clientId={ clientId }
rootClientId={ rootClientId }
onToggle={ this.selectOnOpen }
/>
</div>
<div className="editor-block-list__empty-block-inserter">
<Inserter
position="top right"
onToggle={ this.selectOnOpen }
/>
</div>
</Fragment>
) }
</IgnoreNestedEvents>
);
/* eslint-enable jsx-a11y/no-static-element-interactions, jsx-a11y/onclick-has-role, jsx-a11y/click-events-have-key-events */
} }
</HoverArea>
);
}
}
const applyWithSelect = withSelect(
( select, { clientId, rootClientId, isLargeViewport } ) => {
const {
isBlockSelected,
isAncestorMultiSelected,
isBlockMultiSelected,
isFirstMultiSelectedBlock,
isTyping,
isCaretWithinFormattedText,
getBlockIndex,
getBlockMode,
isSelectionEnabled,
getSelectedBlocksInitialCaretPosition,
getEditorSettings,
hasSelectedInnerBlock,
getTemplateLock,
__unstableGetBlockWithoutInnerBlocks,
} = select( 'core/editor' );
const block = __unstableGetBlockWithoutInnerBlocks( clientId );
const isSelected = isBlockSelected( clientId );
const { hasFixedToolbar, focusMode } = getEditorSettings();
const templateLock = getTemplateLock( rootClientId );
const isParentOfSelectedBlock = hasSelectedInnerBlock( clientId, true );
// The fallback to `{}` is a temporary fix.
// This function should never be called when a block is not present in the state.
// It happens now because the order in withSelect rendering is not correct.
const { name, attributes, isValid } = block || {};
return {
isPartOfMultiSelection:
isBlockMultiSelected( clientId ) || isAncestorMultiSelected( clientId ),
isFirstMultiSelected: isFirstMultiSelectedBlock( clientId ),
// We only care about this prop when the block is selected
// Thus to avoid unnecessary rerenders we avoid updating the prop if the block is not selected.
isTypingWithinBlock:
( isSelected || isParentOfSelectedBlock ) && isTyping(),
isCaretWithinFormattedText: isCaretWithinFormattedText(),
order: getBlockIndex( clientId, rootClientId ),
mode: getBlockMode( clientId ),
isSelectionEnabled: isSelectionEnabled(),
initialPosition: getSelectedBlocksInitialCaretPosition(),
isEmptyDefaultBlock:
name && isUnmodifiedDefaultBlock( { name, attributes } ),
isMovable: 'all' !== templateLock,
isLocked: !! templateLock,
isFocusMode: focusMode && isLargeViewport,
hasFixedToolbar: hasFixedToolbar && isLargeViewport,
// Users of the editor.BlockListBlock filter used to be able to access the block prop
// Ideally these blocks would rely on the clientId prop only.
// This is kept for backward compatibility reasons.
block,
name,
attributes,
isValid,
isSelected,
isParentOfSelectedBlock,
};
}
);
const applyWithDispatch = withDispatch( ( dispatch, ownProps, { select } ) => {
const { getBlockSelectionStart } = select( 'core/editor' );
const {
updateBlockAttributes,
selectBlock,
multiSelect,
insertBlocks,
insertDefaultBlock,
removeBlock,
mergeBlocks,
replaceBlocks,
editPost,
toggleSelection,
} = dispatch( 'core/editor' );
return {
onChange( clientId, attributes ) {
updateBlockAttributes( clientId, attributes );
},
onSelect( clientId = ownProps.clientId, initialPosition ) {
selectBlock( clientId, initialPosition );
},
onInsertBlocks( blocks, index ) {
const { rootClientId } = ownProps;
insertBlocks( blocks, index, rootClientId );
},
onInsertDefaultBlockAfter() {
const { order, rootClientId } = ownProps;
insertDefaultBlock( {}, rootClientId, order + 1 );
},
onRemove( clientId ) {
removeBlock( clientId );
},
onMerge( forward ) {
const { clientId } = ownProps;
const {
getPreviousBlockClientId,
getNextBlockClientId,
} = select( 'core/editor' );
if ( forward ) {
const nextBlockClientId = getNextBlockClientId( clientId );
if ( nextBlockClientId ) {
mergeBlocks( clientId, nextBlockClientId );
}
} else {
const previousBlockClientId = getPreviousBlockClientId( clientId );
if ( previousBlockClientId ) {
mergeBlocks( previousBlockClientId, clientId );
}
}
},
onReplace( blocks ) {
replaceBlocks( [ ownProps.clientId ], blocks );
},
onMetaChange( meta ) {
editPost( { meta } );
},
onShiftSelection() {
if ( ! ownProps.isSelectionEnabled ) {
return;
}
if ( getBlockSelectionStart() ) {
multiSelect( getBlockSelectionStart(), ownProps.clientId );
} else {
selectBlock( ownProps.clientId );
}
},
toggleSelection( selectionEnabled ) {
toggleSelection( selectionEnabled );
},
};
} );
export default compose(
withViewportMatch( { isLargeViewport: 'medium' } ),
applyWithSelect,
applyWithDispatch,
withFilters( 'editor.BlockListBlock' )
)( BlockListBlock );